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Authors
Advisor(s)
Abstract(s)
The design of green fiber-reinforced
nanocomposites with enhanced properties and dura bility has attracted attention from scientists. The
present study aims to investigate the potential of
bacterial nanocellulose (BNC) as a green additive for
fiber–cement composites. Inverse gas chromatography
(IGC) was used to evaluate the influence of incorpo ration of BNC as powder or gel, or coated onto the
bagasse fibers, on the fiber–cement composite (FCC)
surface. The results indicated that BNC incorporation
made the FCC surface more reactive, increasing the
dispersive component of the surface energy. The most
relevant effects were found for BNC incorporation as
gel or coated on the fibers. Incorporation of BNC as
gel resulted in a predominantly organic FCC surface
with substantial decreased surface basicity (Ka/Kb
ratio from 2.88 to 5.75). IGC also showed that FCC
with BNC incorporated as gel was more susceptible to
hydration. However, BNC coated on fibers prevented
fiber mineralization, increasing the inorganic materi als at the surface, which caused an increase in the
surface basicity (Ka/Kb ratio decrease to 2.00). These
promising results could contribute to development of a
new generation of green hybrid composites. The IGC
technique enabled understanding of the physicochem ical changes that occur on deliberate introduction of
nanosized bacterial cellulose into fiber–cement
composites.
Description
Keywords
Bacterial nanocellulose Bagasse fiber Green composites Inverse gas chromatography (IGC) Fiber–cement composites . Faculdade de Ciências Exatas e da Engenharia
Citation
Mohammadkazemi, F., Aguiar, R., & Cordeiro, N. (2017). Improvement of bagasse fiber–cement composites by addition of bacterial nanocellulose: an inverse gas chromatography study. Cellulose, 24(4), 1803-1814.
Publisher
Springer